1 files changed, 59 insertions, 0 deletions
diff --git a/packages/gitbook-core/src/components/HotKeys.js b/packages/gitbook-core/src/components/HotKeys.js
new file mode 100644
index 0000000..e2a8154
--- /dev/null
+++ b/packages/gitbook-core/src/components/HotKeys.js
@@ -0,0 +1,59 @@
+const React = require('react');
+const Mousetrap = require('mousetrap');
+const { Map } = require('immutable');
+
+/**
+ * Defines hotkeys globally when this component is mounted.
+ *
+ * keyMap = {
+ *   'escape': (e) => quit()
+ *   'mod+s': (e) => save()
+ * }
+ *
+ * <HotKeys keyMap={keyMap}>
+ *   < ... />
+ * </HotKeys>
+ */
+
+const HotKeys = React.createClass({
+    propTypes: {
+        children: React.PropTypes.node.isRequired,
+        keyMap: React.PropTypes.objectOf(React.PropTypes.func)
+    },
+
+    getDefaultProps() {
+        return { keyMap: {} };
+    },
+
+    updateBindings(keyMap) {
+        Map(keyMap).forEach((handler, key) => {
+            Mousetrap.bind(key, handler);
+        });
+    },
+
+    clearBindings(keyMap) {
+        Map(keyMap).forEach((handler, key) => {
+            Mousetrap.unbind(key, handler);
+        });
+    },
+
+    componentDidMount() {
+        this.updateBindings(this.props.keyMap);
+    },
+
+    componentDidUpdate(prevProps) {
+        this.clearBindings(prevProps.keyMap);
+        this.updateBindings(this.props.keyMap);
+    },
+
+    componentWillUnmount() {
+        this.clearBindings(this.props.keyMap);
+    },
+
+    render() {
+        // Simply render the only child
+        return React.Children.only(this.props.children);
+    }
+});
+
+module.exports = HotKeys;